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Amgueddfa Cymru – Museum Wales
Typed in black ink on off-white paper. Signed in green pencil. Amalgamated Anthracite Collieries Ltd headed paper. A letter from Amalgamated Anthracite Collieries Ltd to Major E.I.David regarding operating costs. Dated 16 October 1929. Loose within a beige/light brown card file labeled 'general information file, power generation' and 'compressed air production.'
